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If one decision has 4 options and an independent decision has 3, together they have 12 outcomes. You multiply rather than add whenever the choices happen together rather than instead of each other. The word and usually means multiply; or usually means add.
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No indexed official paper question has been tagged with CNT-03 yet. The index grows one paper at a time, and it records only question numbers, point values and our own skill tags — never the problems themselves.